Surface protecting film

Abstract

A surface protection film is disclosed, comprising a back face layer, an intermediate layer, and an adhesive layer, all constructed from polypropylene or polyethylene based resins. The back face layer features a surface with an arithmetic average roughness (Ra) of 0.5 μm or less, a ten point average roughness (Rz) ranging from 2 to 8 μm, and a periodic protrusion height not exceeding 9 μm. The adhesive layer surface exhibits an arithmetic average roughness (Ra) of 0.3 μm or less, a ten point average roughness (Rz) between 0.5 and 4 μm, and a maximum fisheye height of 1.5 μm or less, providing enhanced protection and durability for various surfaces.

1 . A surface protection film comprising at least a back face layer, an intermediate layer, and an adhesive layer, wherein the back face layer, the intermediate layer, and the adhesive layer are each made of a polypropylene based resin or a polyethylene based resin,
 the surface of the back face layer having an arithmetic average roughness (Ra) of 0.5 μm or less, a ten point average roughness (Rz) of 2 to 8 μm, and a periodic protrusion height of 9 μm or less, and   the surface of the adhesive layer having an arithmetic average roughness (Ra) of 0.3 μm or less, a ten point average roughness (Rz) of 0.5 to 4 μm, and a maximum fisheye height of 1.5 μm or less. 1.